Try emailing your photos to Dean Ligget. He's in Ohio, and bought most of Bob Smith (Motopoint) Bimota parts stock a few years back.
I know he has a supply of the similar large aluminum 'washers' as used on the DB4 fairing, because he sold me some as spares. Dunno if they're exactly the same tho (all his parts might be pre-DB7), but Dean's pretty knowlegeable about Bimotas, and great to deal with.
diamondcorsa@gmail.com
Jeremy